Re: Yes, I know this is the wrong mailing list
George Mitchell <george@m5p.com> Wed, 11 July 2012 01:46 UTC
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Date: Tue, 10 Jul 2012 21:47:15 -0400
From: George Mitchell <george@m5p.com>
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To: Mark Andrews <marka@isc.org>
Subject: Re: Yes, I know this is the wrong mailing list
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On 07/10/12 21:35, Mark Andrews wrote: > In message <4FFCCD9A.10605@m5p.com>, George Mitchell writes: >> So I was trying to browse the list of IETF mailing lists at www.ietf.org >> to see who might be interested in my failures to browse sites like >> yahoo.com and netflix.com following the onset of World IPv6 Day. >> >> Except that I can't browse www.ietf.org either. >> >> It did work previously. I have a packet capture of the failing "telnet >> www.ietf.org 80" session, if anyone is interested. It looks fine and >> proper, all the expected SYNs and ACKs as I sent my HTTP request, >> except for the failure to return any HTTP response. I'm running >> FreeBSD 9.0-STABLE. 8.2-STABLE also fails the same way. No doubt you >> can reach www.m5p.com over IPv6; it's been working for years. >> >> Would one of you be able to tell me which mailing should I be using? >> My apologies for the inappropriate message. -- George Mitchell >> -------------------------------------------------------------------- >> IETF IPv6 working group mailing list >> ipv6@ietf.org >> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 >> -------------------------------------------------------------------- > > This sort of failure is usually a PMTUD failure. If you are using > a tunnel you need to ensure that your tunnel provider sends back > PTB's. The IETF servers do see the PTB's. www.ietf.org does work > over tunnels. > > You can test this theory by lowering the local mtu using "route > change -inet6 :: -mtu 1280" (from memory). This will change the > advertised mss from 1440. "route -n get -inet6 ::" will show you > the current values. > Thanks very much -- your diagnosis is correct! Using "route change -inet6 :: -mtu 1280" fixed the problem for www.ietf.org and all the other sites I've been having problems with, too. We now return you to your normal working group traffic. -- George
- Yes, I know this is the wrong mailing list George Mitchell
- Re: Yes, I know this is the wrong mailing list Mark Andrews
- Re: Yes, I know this is the wrong mailing list George Mitchell
- Re: Yes, I know this is the wrong mailing list Mark Andrews
- Re: Yes, I know this is the wrong mailing list George Michaelson
- Re: Yes, I know this is the wrong mailing list Glen
- Re: Yes, I know this is the wrong mailing list Jeroen Massar
- Re: Yes, I know this is the wrong mailing list George Mitchell
- Re: Yes, I know this is the wrong mailing list Simon Perreault
- Re: Yes, I know this is the wrong mailing list Thomas Dineen